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问题 选择题

某无色气体可能含有CO2、CO、H2中的一种或几种，依次进行以下实验(假设每步反应均完全进行)：

①通过赤热的炭层后，恢复到原状态，气体体积不变；②通过灼热的CuO时，固体变成红色：③通入澄清石灰水中，石灰水变浑浊；④通过白色CuSO4粉末时，粉末变成蓝色晶体(白色CuSO4粉末遇水变蓝色)。下列判断正确的是[ ]

A．原混合气体中一定含有CO2、CO、H2

B．原混合气体中一定含有CO，可能含有H2，一定没有CO2

C．原混合气体中一定含有H2和CO，一定没有CO2

D．原混合气体中一定含有CO，可能含有H2和CO2

答案

答案：B

阅读理解
阅读理解。
                                                                                                                   December 25, 2006
         Dear Rose,
         How are you?
         I like your programmes very much. They're very interesting and I can learn a lot from them. I
like travelling and I have won a free four-week trip to England, but I know little about the British way
of life. Would you please write to tell me something about the British meals?
         Thank you.
                                                                                                                                  Yours,
                                                                                                                                Wang Lin

                                                                                                                        January 1, 2007 
        Dear Wang Lin,
        It's very helpful to know something about the British meals before travelling. In many English
houses, people eat four meals a day. They are breakfast, lunch, tea and dinner.
        Breakfast takes place at any time from 7:00 to 9:00 in the morning. They usually have eggs,
bread with butter, cheese and so on. English people drink tea or coffee at breakfast. Lunch comes at
one o'clock. It can be a hamburger or a three-course (三道菜) meal. Afternoon tea is between 4:00
pm and 5:00 pm. Dinner begins at about half past seven. The first course is soup. The next is often
meat or fish with vegetables. Then come fruits of different kinds: apples, pears, bananas and so on.
But not all English people eat like that. Some of them have their dinner in the middle of the day. Their
meals are breakfast, dinner, tea and supper. And all these meals are usually simple.
         Wish you a good time in England!
                                                                                                                                 Yours,
                                                                                                                                  Rose
1. Wang Lin wrote to               .
[ ]
A. say hello to Rose
B. ask Rose about the British meals
C. tell Rose about the free trip
D. tell Rose that he liked her programmes
2. The possible time for breakfast in England is ________.
[ ]
A. from 7:00 pm to 9:00 pm
B. from 7:00 am to 9:00 am
C. from 4:00 pm to 5:00 pm
D. from 4:00 am to 5:00 am
3. In England, afternoon tea often takes place ________.
[ ]
A. before lunch
B. between breakfast and lunch
C. during supper
D. between lunch and dinner
4. The second course at dinner is often ________ at British meals.
[ ]
A. soup
B. cheese
C. bread with butter
D. meat or fish with vegetables
5. Rose answered the letter ________.
[ ]
A. on New Year's Day
B. at the Lantern Festival
C. on New Year's Eve
D. on Christmas Day
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单项选择题

首先提出用血府逐瘀汤治疗头痛的医著是（）

A.《丹溪心法》

B.《医林改错》

C.《类证治裁》

D.《医学入门》

E.《东垣十书》
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